Product Description Material: Rubber Circumference: 2080mm Thickness: 4. 5mmWidth: yellow 6. 4 mm, red, 13 colors in total, mm, 22 mm, purple, small size, round shape with a diameter of 32 mm, green, for use at a depth of 45 m, BLUE 64 mmPeculiaritiesHigh Quality Materials: These power board kits are made of high quality rubber, which is comfortable and environmentally friendly. There are multiple levels to choose from: This package includes 6 levels to choose from. Multifunctional: It can be used on ankles, knees, legs, thighs and wrists. It is also helpful for weight loss. Great for adjusting strength, coordination and balance; Perform assisted pulls/pulls on the tow bar/extension tower and dive stations with your pull-up partner, pilates, crossfit, etc.